1 files changed, 365 insertions, 0 deletions
diff --git a/lib/kopainter/koColorSlider.cc b/lib/kopainter/koColorSlider.cc
new file mode 100644
index 00000000..08c8020a
--- /dev/null
+++ b/lib/kopainter/koColorSlider.cc
@@ -0,0 +1,365 @@
+/* This file is part of the KDE project
+  Copyright (c) 1999 Matthias Elter ([email protected])
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+*/
+
+#include "koColorSlider.h"
+
+#include <qpainter.h>
+#include <qcursor.h>
+#include <qpen.h>
+
+#include <kdebug.h>
+#include <kpixmapeffect.h>
+
+KoColorFrame::KoColorFrame(QWidget *parent):
+QFrame(parent)
+{
+  setFrameStyle(Panel | Sunken);
+  setBackgroundMode(NoBackground);
+
+  /* default values */
+  mC1 = QColor(0, 0, 0);
+  mC2 = QColor(255, 255, 255);
+
+  mColorChanged = false;
+  mPixChanged = false;
+  mDragging = false;
+}
+
+const QColor KoColorFrame::colorAt(const QPoint &p)
+{
+  if(mPixChanged)
+  {
+    mImage = mPixmap.convertToImage();
+    mPixChanged = false;
+  }
+
+  if(p.x() >= mPixmap.width() || p.y() >= mPixmap.height())
+    return QColor(255,255,255);
+
+  return QColor(mImage.pixel(p.x(), p.y()));
+}
+
+void KoColorFrame::slotSetColor1(const QColor &c)
+{
+  mC1 = c;
+  mColorChanged = true;
+  mPixChanged = true;
+  repaint();
+}
+
+void KoColorFrame::slotSetColor2(const QColor &c)
+{
+  mC2 = c;
+  mColorChanged = true;
+  repaint();
+}
+
+void KoColorFrame::drawContents(QPainter *p)
+{
+  QRect r = contentsRect();
+
+  if((mPixmap.size() != r.size()) || mColorChanged)
+  {
+    mPixmap.resize(r.width() + 1, r.height() + 1);
+    KPixmapEffect::gradient(mPixmap, mC1, mC2, KPixmapEffect::HorizontalGradient);
+    mColorChanged = false;
+    mPixChanged = true;
+  }
+
+  p->drawPixmap(r.left(), r.top(), mPixmap);
+}
+
+void KoColorFrame::mousePressEvent(QMouseEvent *e)
+{
+  if(e->button() & LeftButton)
+  {
+    emit clicked(e->pos());
+
+    mDragging = true;
+    QPoint pos = QPoint(e->pos().x() - contentsRect().left(), e->pos().y() - contentsRect().top());
+
+    if(pos.x() < 0)
+      pos.setX(0);
+    else if(pos.x() >= contentsRect().width())
+      pos.setX(contentsRect().width()-1);
+
+    if(pos.y() < 0)
+      pos.setY(0);
+    else if(pos.y() >= contentsRect().height())
+      pos.setY(contentsRect().height()-1);
+
+    QColor c = colorAt(pos);
+    emit colorSelected(c);
+  }
+  else
+    QFrame::mousePressEvent(e);
+}
+
+void KoColorFrame::mouseReleaseEvent(QMouseEvent *e)
+{
+  if(e->button() & LeftButton)
+    mDragging = false;
+  else
+    QFrame::mouseReleaseEvent(e);
+}
+
+void KoColorFrame::mouseMoveEvent(QMouseEvent *e)
+{
+  if(mDragging)
+  {
+    bool set = false;
+    int x = e->pos().x();
+    int y = e->pos().y();
+
+    int left = contentsRect().left();
+    int right = contentsRect().left() + contentsRect().width();
+    int top = contentsRect().top();
+    int bottom =  contentsRect().top() + contentsRect().height();
+
+    if(x < left)
+    {
+      x = left;
+      set = true;
+    }
+    else if(x > right)
+    {
+      x = right;
+      set = true;
+    }
+    if(y < top)
+    {
+      y = top;
+      set = true;
+    }
+    else if(y > bottom)
+    {
+      y = bottom;
+      set = true;
+    }
+
+//    if(set)
+//      QCursor::setPos(mapToGlobal(QPoint(x,y)));
+
+    QPoint pos = QPoint(x - contentsRect().left(), y - contentsRect().top());
+
+    QColor c = colorAt(pos);
+    emit colorSelected(c);
+  }
+  else
+    QFrame::mouseMoveEvent(e);
+}
+
+/***********************************************************************************/
+
+KoSliderWidget::KoSliderWidget(QWidget *parent):
+QWidget(parent)
+{
+  mDragging = false;
+  setFixedHeight(6);
+  setFixedWidth(11);
+}
+
+void KoSliderWidget::paintEvent(QPaintEvent *)
+{
+  QPainter p;
+  QPen pen(black, 1);
+  p.begin(this);
+
+  p.setPen(pen);
+  p.drawLine(0, 5, 5, 0);
+  p.drawLine(10, 5, 5, 0);
+  p.drawLine(0, 5, 10, 5);
+  p.end();
+}
+
+void KoSliderWidget::mousePressEvent(QMouseEvent *e)
+{
+  if(e->button() & LeftButton)
+  {
+    mPos = e->pos();
+    mDragging = true;
+  }
+  else
+    QWidget::mousePressEvent(e);
+}
+
+void KoSliderWidget::mouseReleaseEvent(QMouseEvent *e)
+{
+  if(e->button() & LeftButton)
+    mDragging = false;
+  else
+    QWidget::mouseReleaseEvent(e);
+}
+
+void KoSliderWidget::mouseMoveEvent(QMouseEvent *e)
+{
+  if(mDragging)
+  {
+    QWidget *p = parentWidget();
+
+    if(!p)
+      return;
+
+    QPoint newPos = p->mapFromGlobal(QCursor::pos()) - mPos;
+
+    /* don't drag vertically */
+    newPos.setY(pos().y());
+
+    if(newPos.x() < 0)
+      newPos.setX(0);
+    if(newPos.x() > p->width() - width())
+      newPos.setX(p->width() - width());
+
+    move(newPos);
+    emit positionChanged(newPos.x());
+  }
+  else
+    QWidget::mouseMoveEvent(e);
+}
+
+/***********************************************************************************/
+
+KoColorSlider::KoColorSlider(QWidget *parent):
+QWidget(parent)
+{
+  mColorFrame = new KoColorFrame(this);
+  mSlider = new KoSliderWidget(this);
+
+  mMin = 0;
+  mMax = 255;
+  mValue = 0;
+
+  connect(mSlider, SIGNAL(positionChanged(int)), this, SLOT(slotSliderMoved(int)));
+  connect(mColorFrame, SIGNAL(clicked(const QPoint &)), this, SLOT(slotFrameClicked(const QPoint &)));
+}
+
+KoColorSlider::~KoColorSlider()
+{
+  delete mColorFrame;
+  delete mSlider;
+}
+
+int KoColorSlider::minValue()
+{
+  return mMin;
+}
+
+int KoColorSlider::maxValue()
+{
+  return mMax;
+}
+
+void KoColorSlider::slotSetRange(int min, int max)
+{
+  if(min >= max)
+    return;
+
+  mMin = min;
+  mMax = max;
+}
+
+void KoColorSlider::resizeEvent(QResizeEvent *e)
+{
+  QWidget::resizeEvent(e);
+  // m_pSlider->width()/2 * 2 seems stupid but is not because for example
+  // m_pSlider->width() == 11 I get 10.
+  mColorFrame->setGeometry(mSlider->width() / 2, 0, width() - mSlider->width() / 2 * 2, height() - mSlider->height());
+  slotSetValue(mValue);
+}
+
+void KoColorSlider::slotSetColor1(const QColor &c)
+{
+  mColorFrame->slotSetColor1(c);
+}
+
+void KoColorSlider::slotSetColor2(const QColor &c)
+{
+  mColorFrame->slotSetColor2(c);
+}
+
+void KoColorSlider::slotSetValue(int value)
+{
+  if(value < mMin)
+    value = mMin;
+  if(value > mMax)
+    value = mMax;
+
+  mValue = value;
+
+  int range = mMax - mMin;
+  float v = value;
+  if(mMin < 0)
+    v += -mMin;
+
+  float factor = v / range;
+  int x = static_cast<int>(factor * mColorFrame->contentsRect().width());
+
+  mSlider->move(QPoint(x, height() - mSlider->height()));
+}
+
+void KoColorSlider::slotSliderMoved(int x)
+{
+  if(x < 0)
+    x = 0;
+  if(x > mColorFrame->contentsRect().width())
+    x = mColorFrame->contentsRect().width();
+
+  float factor = x;
+  factor /= mColorFrame->contentsRect().width();
+  int range = mMax - mMin;
+
+  mValue = static_cast<int>(factor * range);
+
+  emit valueChanged(mValue);
+  emit colorSelected(mColorFrame->colorAt(QPoint(x, mColorFrame->contentsRect().height()/2)));
+}
+
+void KoColorSlider::slotFrameClicked(const QPoint &p)
+{
+  QPoint local = mColorFrame->mapToParent(p);
+  QPoint pos = QPoint(local.x() - mSlider->width() / 2, height() - mSlider->height());
+
+  if(pos.x() < 0)
+    pos.setX(0);
+  else if(pos.x() > width() - mSlider->width())
+    pos.setX(width() - mSlider->width());
+
+  mSlider->move(pos);
+  slotSliderMoved(pos.x());
+}
+
+void KoColorSlider::mousePressEvent(QMouseEvent *e)
+{
+  if(e->button() & LeftButton)
+  {
+    QPoint pos = QPoint(e->pos().x() - mSlider->width() / 2, height() - mSlider->height());
+
+    if(pos.x() < 0)
+      pos.setX(0);
+    else if(pos.x() > width() - mSlider->width())
+      pos.setX(width() - mSlider->width());
+
+    mSlider->move(pos);
+    slotSliderMoved(pos.x());
+  }
+  else
+    QWidget::mousePressEvent(e);
+}
+
+#include "koColorSlider.moc"